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參數(shù)資料
| 型號(hào)： | LM2598 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features |
| 中文描述： | SIMPLE SWITCHER系列電源轉(zhuǎn)換器150千赫1A步降穩(wěn)壓器的功能， |
| 文件頁數(shù)： | 4/33頁 |
| 文件大?。?/td> | 847K |
| 代理商： | LM2598 |
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LM2598-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J
= 25C, and those with
boldface type
apply over
full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
LM2598-ADJ
Typ
(Note 4)
Units
(Limits)
Limit
(Note 5)
SYSTEM PARAMETERS
(Note 6) Test Circuit Figure 1
V
FB
Feedback Voltage
4.5V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
1A
V
OUT
programmed for 3V. Circuit of Figure 12
1.230
V
1.193/
1.180
1.267/
1.280
V(min)
V(max)
%
η
Efficiency
V
IN
= 12V, V
OUT
= 3V, I
LOAD
= 1A
78
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J
= 25C, and those with
boldface type
apply over
full Operating Tempera-
ture Range
. Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable version and V
IN
= 24V for the 12V ver-
sion. I
LOAD
= 200 mA
Symbol
Parameter
Conditions
LM2598-XX
Typ
(Note 4)
Units
(Limits)
Limit
(Note 5)
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only, V
FB
= 1.3V
10
nA
50/
100
nA(max)
kHz
kHz(min)
kHz(max)
V
V(max)
%
f
O
Oscillator Frequency
(Note 7)
150
127/
110
173/
173
V
SAT
Saturation Voltage
I
OUT
= 1A (Note 8) (Note 9)
1
1.2/
1.3
DC
Max Duty Cycle (ON)
Min Duty Cycle (OFF)
Current Limit
(Note 9)
(Note 10)
Peak Current, (Note 8) (Note 9)
100
0
1.5
I
CL
A
1.2/
1.15
2.4/
2.6
50
A(min)
A(max)
μA(max)
mA
mA(max)
mA
mA(max)
μA
μA(max)
C/W
C/W
C/W
C/W
C/W
I
L
Output Leakage Current
Output = 0V (Note 9) (Note 10) (Note 11)
Output = 1V
2
15
I
Q
Operating Quiescent
Current
Standby Quiescent
Current
Thermal Resistance
SD /SS Pin Open, (Note 10)
5
10
I
STBY
SD /SS pin = 0V, (Note 11)
85
200/
250
θ
JC
θ
JA
θ
JA
θ
JA
θ
JA
SHUTDOWN/SOFT-START CONTROL
Test Circuit of Figure 1
V
SD
Shutdown Threshold
Voltage
TO220 or TO263 Package, Junction to Case
TO220 Package, Junction to Ambient (Note 12)
TO263 Package, Junction to Ambient (Note 13)
TO263 Package, Junction to Ambient (Note 14)
TO263 Package, Junction to Ambient (Note 15)
2
50
50
30
20
1.3
V
Low, (Shutdown Mode)
High, (Soft-start Mode)
V
OUT
= 20% of Nominal Output Voltage
V
OUT
= 100% of Nominal Output Voltage
0.6
2
V(max)
V(min)
V
V
SS
Soft-start Voltage
2
3
L
www.national.com
4
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|---|---|
| LM2598S-12 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2598S-12/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2598S12P+ | 制造商:Texas Instruments 功能描述: |
| LM2598S-12P+ | 制造商:Texas Instruments 功能描述:2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO7 |
| LM2598S-3.3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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